This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Please make the subject line more meaningful .
Personally I feel scoring in the exam depends entirely on the knowledge of the language and its use.
Head First is indeed a good book, find out more views in the SCJP and Book review forums.